1 #ifndef _LINUX_CTYPE_H 2 #define _LINUX_CTYPE_H 3 4 /* 5 * NOTE! This ctype does not handle EOF like the standard C 6 * library is required to. 7 */ 8 9 #define _U 0x01 /* upper */ 10 #define _L 0x02 /* lower */ 11 #define _D 0x04 /* digit */ 12 #define _C 0x08 /* cntrl */ 13 #define _P 0x10 /* punct */ 14 #define _S 0x20 /* white space (space/lf/tab) */ 15 #define _X 0x40 /* hex digit */ 16 #define _SP 0x80 /* hard space (0x20) */ 17 18 extern const unsigned char _ctype[]; 19 20 #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) 21 22 #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) 23 #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) 24 #define iscntrl(c) ((__ismask(c)&(_C)) != 0) 25 static inline int isdigit(int c) 26 { 27 return '0' <= c && c <= '9'; 28 } 29 #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) 30 #define islower(c) ((__ismask(c)&(_L)) != 0) 31 #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) 32 #define ispunct(c) ((__ismask(c)&(_P)) != 0) 33 /* Note: isspace() must return false for %NUL-terminator */ 34 #define isspace(c) ((__ismask(c)&(_S)) != 0) 35 #define isupper(c) ((__ismask(c)&(_U)) != 0) 36 #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) 37 38 #define isascii(c) (((unsigned char)(c))<=0x7f) 39 #define toascii(c) (((unsigned char)(c))&0x7f) 40 41 static inline unsigned char __tolower(unsigned char c) 42 { 43 if (isupper(c)) 44 c -= 'A'-'a'; 45 return c; 46 } 47 48 static inline unsigned char __toupper(unsigned char c) 49 { 50 if (islower(c)) 51 c -= 'a'-'A'; 52 return c; 53 } 54 55 #define tolower(c) __tolower(c) 56 #define toupper(c) __toupper(c) 57 58 /* 59 * Fast implementation of tolower() for internal usage. Do not use in your 60 * code. 61 */ 62 static inline char _tolower(const char c) 63 { 64 return c | 0x20; 65 } 66 67 /* Fast check for octal digit */ 68 static inline int isodigit(const char c) 69 { 70 return c >= '0' && c <= '7'; 71 } 72 73 #endif 74